neptronix said:That board is no good for our use.
It may look convenient and all, however it is far, far better to make your own serial and parallel harnesses.
The output leads are very thin, so they will introduce resistance. you will need multiple ones too, and they are bulky.
These are great for paralleling balance leads: http://www.progressiverc.com/adapter-cables-and-boards/parallel-cables.html
As for the BMS, 95% of lipo users don't have any BMS. Read up as to why.. there is a lot to know. Can't be summarized in one thread..
p.s. you don't need to fork over the extra money for the 30s packs. 20C 5ah packs are rated to output 100 amps, so if you are only using a meager 5 amp hour pack, the 20C is fine.
The more packs you run in parallel, the less the C rate matters.
I have 38v 20AH consisting of 8x 20C 5ah 5S packs.. my load on them is 40 amps at most.. yet they can discharge 400 amps..
As a rule Turnigy is under rated on the AH so this is more false then true.neptronix said:Damn, well if you're gonna go that big, I would recommend the zippy 20C over the turnigy 20C. They are notably more narrow, and a bit lighter. It will add up to save you some space and a pound or two overall.
Only downside is that 20C zippy has an overrated C rate, it's more like a 10C or 12C rate in real life, but on a 20AH pack it really doesn't matter.
a4178 said:Possible stupid question from a battery noob. Should I stay away from charging my batteries after my commute and letting them sit at 4.2V overnight for my commute in the morning? I keep reading not to store them at full charge but at nominal voltage, but does overnight count as "storage" any help is appreciated.
a4178 said:I have a Turnigy Accucell 8150 and it seems to like charging to 4.18V/cell. The thing didn't come with any kind of manual so I haven't quite figured out how to change that so that I could lower it. Time to use the power of google/ES search bar.
In case anyone stumbles across this, it turns out a couple of my cells were failing. It turns out that healthy LiPo shouldn't have much voltage sag.headwind said:Just a quick noob questions, is the LVC based on unloaded voltage? (eg without voltage sag)
The CycleAnalyst is telling me that I'm dropping below 2.7v per cell at full load, even for a freshly charged battery. I've checked that I'm not drawing too much current (max 7.5C on 20C rated batteries), so I'm wondering if the Golden Rule is based on open circuit voltage.
neptronix said:As for the BMS, 95% of lipo users don't have any BMS. Read up as to why.. there is a lot to know. Can't be summarized in one thread..
Thanks heaps mate, and that charger is definitely cheaper than the ones iv been looking at. Has it ever had any problems or not balanced your batteries properly? And are you using yours in an rc or a e-bike? Id very much like some more info if its used in a bike and what specs and hub motor your using. Thanks heaps.BikeFanatic said:Here is a RC charger that I use, so I can recommend it. It will charge two at once but you will need to purchase a powerful power supply to power this charger I will link to both.Not cheap but good especially for newbie.
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=20613
Here is a power supply with this one you could charge each six series battery at 5-7 amps each.
http://www.hobbyking.com/hobbyking/store/__17754__HobbyKing_540w_100_120v_Power_Supply_13_8v_18v_30amp_.html